Speckle variance optical coherence tomography using an SS-OCT system and an extended k-sampling clock

Reiko Yoshimura; Dong-Hak Choi; Kohji Ohbayashi

doi:10.1117/12.2250717

17 February 2017 Speckle variance optical coherence tomography using an SS-OCT system and an extended k-sampling clock

Reiko Yoshimura, Dong-Hak Choi, Kohji Ohbayashi

Proceedings Volume 10053, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXI; 100532P (2017) https://doi.org/10.1117/12.2250717
Event: SPIE BiOS, 2017, San Francisco, California, United States

Abstract

is vacant or filled with material having a refractive index different from the tissue, the observed structure is deformed significantly. This deformation artifact can be minimized by filling the cavity with liquid having a refractive index nearly equal to the tissue. Furthermore, by using dynamical OCT method, cavity image intensity can be significantly enhanced compared with the tissue. This image contrast improvement may allow imaging of cavity structures inside deep in tissues. In this paper, we demonstrate good contrast of speckle variance OCT imaging of phantoms. A trial of deep OCT imaging is introduced with which we can extend the OCT depth range to 27.5 mm with a commercial swept source, while the preinstalled k-clock allows only the OCT depth range of 5 mm.

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Reiko Yoshimura, Dong-Hak Choi, and Kohji Ohbayashi "Speckle variance optical coherence tomography using an SS-OCT system and an extended k-sampling clock", Proc. SPIE 10053, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXI, 100532P (17 February 2017); https://doi.org/10.1117/12.2250717

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KEYWORDS

Optical coherence tomography

Point spread functions

Tissues

Imaging systems

Speckle

Reflectors

Refractive index

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